Development of self-healing property in self compacting concrete
Self compacting concrete is incorporated with a high amount of fines and chemical admixtures with a low w/c ratio, which leads to shrinkage and microcracks. Shrinkage in the concrete, along with the congested reinforcement, leads to a heavy number of cracks. To stop the damage due to these cracks, t...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524000937 |
| _version_ | 1797319448490672128 |
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| author | Bhaskar Bashaveni Rama Mohan Rao Pannem |
| author_facet | Bhaskar Bashaveni Rama Mohan Rao Pannem |
| author_sort | Bhaskar Bashaveni |
| collection | DOAJ |
| description | Self compacting concrete is incorporated with a high amount of fines and chemical admixtures with a low w/c ratio, which leads to shrinkage and microcracks. Shrinkage in the concrete, along with the congested reinforcement, leads to a heavy number of cracks. To stop the damage due to these cracks, the self-healing property was developed in self-compacting concrete by incorporating self-healing materials like bacteria and calcium lactate into it. To optimise the self-healing materials, including the reference mix, 10 mixes are cast and tested for strength and healing properties. In those mixes, both bacteria and lactate are used by 0.2%, 0.4%, 0.5%, 0.6%, 0.8%, 1%, and 1.2% by weight of cement. The compressive strength, UPV, and rebound hammer tests are done on cubes with 100 mm sides. Split tensile strength and self-healing tests are done on cylinders with a 100 mm diameter and a 200 mm height. When a small amount of calcium lactate was used, the compressive strength of the concrete was higher compared to the reference mix. However, increasing the amount of calcium lactate resulted in a decrease in the strength of the concrete. Maximum healing and relatively good strength were found with 0.5% bacteria and 0.5% calcium lactate. FESEM-EDS and XRD results make it clear that the precipitation formed is in the form of rhombohedral calcite. |
| first_indexed | 2024-03-08T04:08:03Z |
| format | Article |
| id | doaj.art-e6026af1701b41bd9df9eae39fee4001 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-08T04:08:03Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-e6026af1701b41bd9df9eae39fee40012024-02-09T04:48:17ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02942Development of self-healing property in self compacting concreteBhaskar Bashaveni0Rama Mohan Rao Pannem1School of Civil Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, IndiaCentre for Disaster Mitigation and Management, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India; Corresponding author.Self compacting concrete is incorporated with a high amount of fines and chemical admixtures with a low w/c ratio, which leads to shrinkage and microcracks. Shrinkage in the concrete, along with the congested reinforcement, leads to a heavy number of cracks. To stop the damage due to these cracks, the self-healing property was developed in self-compacting concrete by incorporating self-healing materials like bacteria and calcium lactate into it. To optimise the self-healing materials, including the reference mix, 10 mixes are cast and tested for strength and healing properties. In those mixes, both bacteria and lactate are used by 0.2%, 0.4%, 0.5%, 0.6%, 0.8%, 1%, and 1.2% by weight of cement. The compressive strength, UPV, and rebound hammer tests are done on cubes with 100 mm sides. Split tensile strength and self-healing tests are done on cylinders with a 100 mm diameter and a 200 mm height. When a small amount of calcium lactate was used, the compressive strength of the concrete was higher compared to the reference mix. However, increasing the amount of calcium lactate resulted in a decrease in the strength of the concrete. Maximum healing and relatively good strength were found with 0.5% bacteria and 0.5% calcium lactate. FESEM-EDS and XRD results make it clear that the precipitation formed is in the form of rhombohedral calcite.http://www.sciencedirect.com/science/article/pii/S2214509524000937Bio-ConcreteReboundUltrasonic pulseSelf-compactingSelf-healing |
| spellingShingle | Bhaskar Bashaveni Rama Mohan Rao Pannem Development of self-healing property in self compacting concrete Case Studies in Construction Materials Bio-Concrete Rebound Ultrasonic pulse Self-compacting Self-healing |
| title | Development of self-healing property in self compacting concrete |
| title_full | Development of self-healing property in self compacting concrete |
| title_fullStr | Development of self-healing property in self compacting concrete |
| title_full_unstemmed | Development of self-healing property in self compacting concrete |
| title_short | Development of self-healing property in self compacting concrete |
| title_sort | development of self healing property in self compacting concrete |
| topic | Bio-Concrete Rebound Ultrasonic pulse Self-compacting Self-healing |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524000937 |
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